Protected metal sheet.



T. D. MILLER. PRoTBcTEp METAL SHEET. APPLICATION FILED PEB.24, 1913.

Patented Nov. 3, 1914.

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- with the accompanying drawings, is a specii the line 5 THOMAS J).MILLER, or cAroaswLm, mAnYLANn-Assieiron 'a'o Assns'ros rabmacrnn METALCOMPANY, or BEAVER mus, PENNSYLVANIA, A CQBPQBATION or MASSACHUSETTS. v

To all whom itma concern. v v

Be it known t at I, THOMAS D. MnmiR, a citizen of the United States,residing in Catonsville, county of Baltimore, and State of Maryland,have invented an Improvement' in Protected 'Metal Sheets, of which thefollowing description, in connection fication, like letters on thedrawings representing like parts. p

This invention relates to building material of that character in whichsheets of asbestos paper or like material are affixed by an asphaltcement to the opposite surfaces of a metal sheet, preferably steel, andsubstantially such as shown and described in U. S. Patent No. 1,002,303dated Sept. 5, 1911.

The present invention has for its object to prolong the life andeffectiveness of building material of the. character described, which isaccomplished in accordance with this invention by enveloping the sideedges. of the asphalt covered metal sheet with folds of ashestosp'aper,which folds may be secured to or form part of one orboth of the asbestossheets which are afiixed to the opposite surfaces of the metal sheet.

'I igure 1 is a plan view of one form of building material embodyingthis invention. Fig. 2, a cross section on the line 2-2, Fig. 1. Figs. 3and 4 modified forms'to be referred to, and Fig. 5, an enlarged sectionon 5, Fig. 4. I

Referring to the drawing a represents a metal sheet, preferably-steel oriron and which may be of any desired size accord ing to which part ofthe building it is to be used in, and b, 0, represent sheets orpreformed layers of asbestos paper or the like, which are firmlyattached to the metal, sheet by an interposed layer d of asphalt cement.The asphalt (Z covers the edges of the metal sheet a, and in accordancewith. the present invention the asphalt which covers the side edges ofsaid metal sheet is enveloped in folds 10, 12, of asbestos paper whichextend the length of the metal sheet and which may besecured to or formpart of one or both of the sheets 7), c.

In Figs. 1, 2 and 3, the folds 10, 12 are represented as forming part ofthe asbestos sheet I), which in this case is made wider than the metalsheet a, so that theopposite Specification of Letters Patent.

ti Application filed February 24', 1913. Serial No. 750,105.

sides ofthe asbestos sheet I) may be folded v rno'momn METAL SHEET.

Patented Nov. 3, 1914.

theside edges of the asphalt covered metal sheet-a and be carried underand cemented'tothe asbestos sheet 0. This construction'is advantageous,in that, the sheet 0 may be made of an inferior quality of asbestos aperand the sheet I; of a superior quality, or in such case,-the asbestosprotected metal sheet may be placed in the building, so that theinferior asbestos sheet 0 will not be subjected to the same conditionsas the asbestos sheet I), and conse- 'quently need not be ofas highgrade of asbestos. The asbestos folds 10, 12, envelop the side edges ofthe metal sheet a, and the asphaltfd which covers the said side edges.As a result, the life and usefulness of the asbestos protected metalsheet as a building material is materially prolonged, for the reasonthat the asphalt covering the side edgesof the metal sheet is itselfcovered by a thickness of asbestos paper which is opaque. and protectsthe asphalt from the inpirious effects of light, air, gases and fumesand also from mechanical abrasion, so that the asphalt is kept fromdeterioratmg, and is maintained in its most effective condition for amaterially longer time than 18 the case when the asphalt is exposed tothe action of light, air, gases and fumes.

The ends of the metal sheet may be protected by the overlapping ends ofthe asoesmade wide enough to envelop the sides of the asphalt coveredmetal sheet a and have their ends overlapped, and the overlappingportionsof the asbestos sheet'may be cemented together with asphalt orother adhesive material. In the present instance the metal sheet a isshown as corrugated but it may be flat if desired. So also theprotectivefolds 10, 12 are represented as forming integral parts of one of theasbestos sheets,

but they may be separate therefrom and ce- ,mented to the sheets I), 0,with asphalt, and

also they may form part of both sheets,

that is, one fold as 1 0 may form part ofthe' sheet 6, and the otherfold 12 may form part of the sheet 0. The protected metal sheet hereinshown, may be made'of sufficient size to be used in the construction ofthe roof, side walls or other part of a building or other structure orthey may be made of substantially the size of a shingle and used as suchin the same manner as the ordinary wooden shingles. In some instancesthe inferior sheet 0 maybe made of paper, felt or like material. Thesheet 6 of high grade asbestos is designed to be exposed to the weatherand may and preferably will be compacted, hardened and waterproofed,substantially as described in the patent referred to. The' ends of thesheets I), a, may overlap the metal sheet a suflicient amount to enablethe said ends to be folded under the ends of the metal sheet, ifdesired.

Claims.

l. A material of the character described, comprising a metal sheethaving affixed to its opposite surfaces by an asphalt cement preformedlayers of asbestos and having its side edges covered with asphalt whichis enveloped by folds of preformed layers of asbestos extendedlongitudinally of the metal sheet.

2. A material of the character described, comprising a metal sheetenveloped in a layer of asphalt cement and having affixedto .itsopposite surfaces preformed sheets of asbestos of .diiterent'grades, oneof the said sheets ofasbestos extendingfrom one surface around both sideedges of the metal sheet and overlapping the other sheet of asbestos.

3. A material of the characterdescribed,

comprising a steel sheet covered with asbestos and having each side edgeof the steel sheet inclosed in a continuous fold of asbestos, the saidfold being adapted to underlie and overlie the steel sheet, and to besecured thereto by an asphalt cement.

4. A material of the character described, comprising a steel sheetenveloped in a layer of asphalt cementand having fixed to one surface apreformed sheet of asbestos of superior quality and to its other surfacean inferior sheet,and folds of asbestos extended longitudinally of thesteel sheet and enveloping the opposite side'edges of the same, saidfolds overlying and underlying the metal sheet and bel g secured theretoby asphalt cement.

5. A material of the character described, comprising a steel sheetcovered with asbestos and having each side edge of the steel sheetinclosed in a continuous fold of fibrous material, the said fold beingadapted to underlie and overlie the steel sheet, and to be securedthereto by an asphalt cement. In testimony whereof, I have signed myname to this specification in the presence of two subscribing witnesses.

. THOMAS D. MILLER. Witnesses:

H. H. ROBERTSON, F. H. HILL;

